What is leukemia?
Leukemia is cancer of the blood cells, usually the white blood cells.
What are the types of leukemia?
There are four main types of leukemia, which can be further divided into subtypes. When classifying the type of leukemia, the first steps are to determine if the cancer is:
1. Lymphocytic or myelogenous leukemia:
Cancer can occur in either the lymphoid or myeloid white blood cells.
When the cancer develops in the lymphocytes (lymphoid cells), it is called lymphocytic leukemia.
When the cancer develops in the granulocytes or monocytes (myeloid cells), it is called myelogenous leukemia.
2. Acute or chronic leukemia:
Leukemia is either acute or chronic.
The new or immature cancer cells, called blasts, remain very immature and cannot perform their functions. The blasts increase in number rapidly, and the disease progresses quickly.
There are some blast cells present, but they are more mature and are able to perform some of their functions. The cells grow more slowly, and the number increases less quickly, so the disease progresses gradually.
Based on these findings, the leukemia is then classified into one of the four main types of leukemias: acute myelogenous leukemia (AML); chronic myelogenous leukemia (CML); acute lymphocytic leukemia (ALL); or chronic lymphocytic leukemia (CLL).
Chronic lymphocytic leukemia (CLL) is a cancer of the blood in which too many lymphocytes, a type of white blood cell, are produced by the bone marrow and by organs of the lymph system.
Normally, most lymphocytes fight infection by making antibodies that attack harmful elements. But, in CLL, the cells are immature and overabundant. They crowd out other blood cells, and may collect in the blood, bone marrow, and lymph tissue. CLL is a slowly progressing disease.
According to the American Cancer Society, about 47,000 leukemia cases are expected to be diagnosed in 2012. CLL will account for about 16,000 of these cases.
Early in the disease, there may be no noticeable symptoms, and many cases are diagnosed on routine blood tests. The following are the most common symptoms of chronic lymphocytic leukemia. However, each individual may experience symptoms differently. Symptoms may include:
The symptoms of chronic lymphocytic leukemia may resemble other blood disorders or medical problems. Always consult your doctor for a diagnosis.
In addition to a complete medical history and physical examination, diagnostic procedures for chronic lymphocytic leukemia may include the following:
Specific treatment for chronic lymphocytic leukemia will be determined by your doctor based on:
Treatment may include:
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